We propose another method to compute the Casimir force in noncommutative Randall-Sundrum braneworld model considered by K. Nouicer and Y. Sabri recently. Our method can be used to compute the Casimir force to any order in the noncommutative parameter. Contrary to the claim made by K. Nouicer and Y. Sabri that repulsive Casimir force can appear in the first order approximation, we show that the Casimir force is always attractive at any order of approximation.PACS numbers: 11.25. Mj, 11.10.Kk, 11.10.Nx In a recent publication [1], K. Nouicer and Y. Sabri computed the Casimir force acting on a pair of parallel plates in the five dimensional Randall-Sundrum braneworlds of type I and type II. They computed the Casimir force to the first order in the noncommutative parameter and claimed that in Randall-Sundrum model of type I (RSI), the presence of noncommutativity will lead to repulsive Casimir force when the plate separation is small.In this report, we present another computation method that allows us to compute to any order of the noncommutative parameter, and investigate whether noncommutativity will change the nature of the Casimir force. Let κ be the parameter governing the degree of curvature of the RSI model. Define ξ = πκe −πκR and let l be the fundamental noncommutative length scale. The Casimir energy between a pair of parallel plates with distance a apart is given bywhere A is the area of the plates and v = 2 accounts for the volume of the orbifold [3]. The eigenfrequencies ω nN are given bywhere κ N , N = 0, 1, 2, . . . , are the effective masses due to the existence of the extra dimension, and κ 0 = 0. We put the factors p ′ and p in (1) so that we can compare to [1]. If one considers massless scalar field with Dirichlet boundary conditions, one should take p = p ′ = 1. In [1], it was claimed that for electromagnetic field with perfectly conducting boundary conditions, one should set p ′ = 2 and p = 3 due to the polarizations of photons in * Electronic address: LeePeng.Teo@nottingham.edu.my 4D and 5D spacetime. For Casimir effect in extra dimensional spacetime as in the present scenario, it is actually questionable whether one can obtain the result for electromagnetic field by simply adding the polarization factors p ′ and p. Such an imposition of polarization factors for Casimir effect in spacetime with extra dimensions was first applied in the paper [4], and was later followed by other works such as [2,5,6]. However, the Casimir effect of electromagnetic field in spacetime with extra dimensions is actually not that simple, and it highly depends on the geometry of the extra dimensions and on how one interprets the perfectly conducting boundary conditions. Different approaches will lead to different results, and one may not be able to obtain the correct 4D limit when the size of the extra dimensions vanishes. Therefore majority of the works in Casimir effect in spacetime with extra dimensions work with scalar field rather than electromagnetic field. Nevertheless, it should be pointed out that in the r...